YAML to JSON Converter

100% In-Browser · Never Uploaded

Parse YAML documents into compliant JSON. Safely rejects duplicate keys and unsupported custom tags for deterministic parsing.

Ready

Input

Output

Reads YAML 1.2 core values. Duplicate mapping keys and custom YAML tags are rejected; bare dates stay strings.

What happens if duplicate keys exist?

Duplicate keys in YAML mappings raise a validation error rather than silently overwriting data.